From the unconventional and awe-inspiring to thehilarious and heartwarming, here's a look at some of the most interesting photos, videos and stories that have our newsroom talking today. What's capturing your attention, filling your inbox and cluttering your Facebook/Twitter feed? Tweet us the stories you're talking about using #InstantIndex or email us at ABC.WorldNews@abc.com and they could appear on World News.

Living in Space Scott Kelly, the identical twin brother of Gabrielle Giffords' husband, Mark Kelly, will attempt to complete the longest spaceflight for an American. Kelly and cosmonaut Mikhail Kornienko are scheduled to spend a year on the International Space Station starting in 2015. Both men have previously lived on the station for six months. The trip is designed to see how long periods of time in space affect the human body.

Least Emotional People Singapore is the least emotional country in the world, according to a new Gallup poll. The study found that 36 percent of Singaporeans reported "feeling either positive or negative emotions … the lowest in the world." Georgia and Lithuania tied for the second least emotional countries and the Philippines took the top spot as the most emotional country.

'Floating Train' The next generation of high-speed trains has arrived in Japan. Central Japan Railway Co. unveiled a train that can travel at more than 310 miles per hour, according to the Telegraph. The train has no wheels and is known as the "floating train" because it uses magnetic levitation. It is scheduled to go into service in 2027.